Question

If the smaller cylinder has a lateral area of approximately 113 square meters, what is the approximate lateral area of the larger cylinder?

48.4 square meters

615.2 square meters

1,435.5 square meters

263.7 square meters

Answer 1

For similar figures,
(ratio of the sides)^2 = ratio of the area
That is
\[(\frac{S_1}{S_2})^2 = \frac{A_1}{A_2}\]
Now, put s1 = 9, s2 = 21 and A1 = 113, solve A2, can you do it?

Answer 2

Yea I can thank you!

Answer 3

Welcome :)